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arXiv · 1210.0410

Microstructural control and tuning of thermal conductivity in La0.67Ca0.33MnO3+/-\delta

J. A. Turcaud·K. Morrison·A. Berenov·N. McN. Alford·K. G. Sandeman·L. F. Cohen
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Abstract

Manganites are one of only a small number of material families currently being trialled as room temperature magnetic refrigerants. Here we examine the dependence of the thermal conductivity, K, of La0.67Ca0.33MnO3+/-{\delta} as a function of density, grain size and silver impregnation around room temperature. We use a simple effective medium model to extract relevant trends in the data and demonstrate a threefold increase in thermal conductivity by silver impregnation.

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J. A. Turcaud, K. Morrison, A. Berenov, N. McN. Alford, K. G. Sandeman, L. F. Cohen. 2012-10-01. Microstructural control and tuning of thermal conductivity in La0.67Ca0.33MnO3+/-\delta. https://doi.org/10.1016/j.scriptamat.2012.11.036

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